Humidifier



FIG. 1 is a perspective view of a humidifier showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in the drawings are for the purpose of illustrating portions of the humidifier and form no part of the claimed design. 

CLAIM The ornamental design for a humidifier, as shown and described. 